US8670395B2 - System and method for priority driven contention scheme for supporting enhanced QoS in a wireless communication network - Google Patents
System and method for priority driven contention scheme for supporting enhanced QoS in a wireless communication network Download PDFInfo
- Publication number
- US8670395B2 US8670395B2 US12/455,438 US45543809A US8670395B2 US 8670395 B2 US8670395 B2 US 8670395B2 US 45543809 A US45543809 A US 45543809A US 8670395 B2 US8670395 B2 US 8670395B2
- Authority
- US
- United States
- Prior art keywords
- priority
- superslot
- mini
- contention
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0866—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access
- H04W74/0875—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access with assigned priorities based access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
Definitions
- the present invention relates to wireless communications and more particularly relates to random access schemes in a wireless network.
- a wireless network may be any type of computer network that is wireless, and the term is commonly associated with a telecommunications network whose interconnections between nodes is implemented without the use of wires, such as a computer network (a type of communications network).
- Wireless telecommunications networks are generally implemented with some type of remote information transmission system that uses electromagnetic waves, such as radio waves, for the carrier and this implementation usually takes place at the physical level or “layer” of the network.
- wireless network examples include wireless personal area networks (WPANs), wireless local area networks (WLANs), and wireless metropolitan area networks (WMANs).
- WPANs wireless personal area networks
- WLANs wireless local area networks
- WMANs wireless metropolitan area networks
- the coordinator of the network partitions the CAP into a number of sub-CAPs, and in each sub-CAP, a set of devices sharing a common parameter contend. In this way, random access efficiency is improved.
- the concept of multiple sub-CAPs may be applied to a WPAN, WLAN, or WMAN.
- aspects described include 1) multiple contention periods for multiple priority classes, 2) the possibility of a device wishing to transmit data having multiple priority flows contending during multiple contention periods, and 3) the possibility for a device wishing to transmit high priority data to contend during a contention period assigned for low priority data.
- a device wishing to transmit low priority data may, in some embodiments, still be given deference in its own contention period.
- One aspect of the disclosure is a system for allocating channel resources in a wireless data communication network, the system comprising an access point configured to transmit a beacon indicative of available channel resources and a partitioning of a contention period into a plurality of superslots, each superslot associated with a priority, and a station configured to contend for the channel by transmitting, during a superslot associated with the identified priority or a superslot associated with a priority lower than the identified priority, data indicative of an allocation of available channel resources.
- Another aspect of the disclosure is a method of allocating channel resources in a wireless data communication network, the method comprising receiving data indicative of available channel resources, receiving data indicative of a partitioning of a contention period into a plurality of superslots, each superslot associated with a priority, identifying a priority of a data flow, and transmitting, during a superslot associated with a priority that is the identified priority or a superslot associated with a priority lower than the identified priority, data indicative of an allocation of the available channel resources.
- Another aspect of the disclosure is a system for allocating channel resources in a wireless data communication network, the system comprising a receiver configured to receive information indicative of available channel resources and to receive information indicative of a partitioning of a contention period into a plurality of superslots, each superslot associated with a priority, a packet classifier configured to identify a priority of a data flow, and a transmitter configured to transmit, during a superslot associated with the identified priority or a superslot associated with a priority lower than the identified priority, data indicative of an allocation of available channel resources.
- Yet another aspect of the disclosure is a method of allocating channel resources in a wireless data communication network, the method comprising transmitting information indicative of available channel resources, transmitting information indicative of a partitioning of a contention period into a plurality of superslots, each superslot associated with a priority, and receiving, during a superslot associated with the identified priority or a superslot associated with a priority lower than the identified priority, data indicative of an allocation of available channel resources.
- FIG. 1 is a block diagram illustrating an example wireless local area network (WLAN) configuration using an access point.
- WLAN wireless local area network
- FIG. 2 is a functional block diagram of an example wireless local area network (WLAN) system, according to one embodiment of the system and method.
- WLAN wireless local area network
- FIG. 3 is a functional block diagram of a transmitter including a packet classifier.
- FIG. 4 is a timeline showing a plurality of superframes (SF) and their constituent parts, according to one embodiment.
- FIG. 5 is a timeline showing a beacon and its constituent parts according to one embodiment.
- FIG. 6 is a flowchart illustrating a method of communicating channel resources and contention period partitioning in a wireless data communication network, according to one embodiment.
- FIG. 7 is a flowchart illustrating a method of allocating channel resources in a wireless data communication network, according to another embodiment.
- FIG. 8 is a flowchart illustrating another embodiment of a method of allocating channel resources in a wireless data communication network.
- FIG. 1 is a block diagram illustrating an example wireless local area network (WLAN) configuration 100 using an access point 101 .
- the example WLAN configuration 100 includes one or more access points 101 and one or more stations 103 .
- the stations 103 include wireless clients.
- the access point 101 is a device that connects a wireless station 103 to the WLAN.
- the access points 101 are connected to a wired (e.g., Ethernet or token ring) or wireless backbone 105 and routes the traffic through the wired or wireless backbone.
- a wired e.g., Ethernet or token ring
- the access point 101 enables a wireless station 103 to communicate with other wired or wireless stations on the WLAN 100 .
- the access point 101 supports the IEEE 802.11 Protocol.
- the access point 101 is responsible for coordinating data transfer between itself and other devices and between two devices by partitioning the wireless channel time into a number of time periods and scheduling communication between specific devices during those time periods.
- the wireless station 103 can be a source of compressed or uncompressed video or audio. Examples of the wireless station 103 include a desktop computer, a laptop computer, a set-top box, a DVD player or recorder, a VCR (video cassette recorder, an audio player, a digital camera, a camcorder, and so forth. In some embodiments, the content can be protected content.
- the wireless station 103 can also be a sink of such data, including a television, a laptop computer, or a media player.
- FIG. 2 shows a generalized block diagram illustrating an example wireless local area network (WLAN) system 200 .
- the example WLAN system 200 includes a wireless transmitter 202 and wireless receiver 204 .
- the WLAN system 200 shown in FIG. 2 represents an IEEE 802.11 stack.
- the transmitter 202 includes a physical (PHY) layer 206 , a media access control (MAC) layer 208 , an upper layer 210 , and one or more antennas.
- the receiver 204 includes a PHY layer 214 , a MAC layer 216 , an upper layer 218 , and one or more antennas.
- the PHY layers 206 , 214 include radio frequency (RF) modules 207 , 217 .
- RF radio frequency
- the PHY layers 206 , 214 provide wireless communication between the transmitter 202 and the receiver 204 via the RF modules 207 , 217 and the one or more antennas through a wireless medium 201 .
- the MAC layers 208 , 216 provides addressing and channel access controls that make it possible for several network nodes to communicate within a multipoint network such as the WLAN 100 shown in FIG. 1 .
- the upper layers 210 , 218 represent one or more layers that are above the MAC layers 208 , 216 , respectively, and send command and/or data messages to the MAC layers.
- the upper layer 210 , 218 includes a network layer.
- the network layer includes an IP protocol that performs the basic task of routing data packets from source to destination.
- the upper layer 210 , 218 further includes a transport layer and an application layer.
- the upper layer 210 , 218 in addition to the transport layer and the application layer, further includes a session layer and a presentation layer.
- the upper layer 210 provides data (e.g., text, graphics, or audio data) and/or command messages to the MAC layer 208 .
- the MAC layer 208 can include a packetization module (not shown) which puts the data and/or command messages into the form of one or more data packets.
- the MAC layer 208 then passes the data packets to the PHY layer 206 .
- the PHY/MAC layers of the transmitter 202 add PHY and MAC headers to the data packets.
- the PHY layer 206 transmits wireless signals including the data packets to the receiver 204 via the RF module 207 over the wireless channel 201 .
- the PHY layer 214 receives the transmitted wireless signals including the data packets via the RF module 217 .
- the PHY/MAC layers 214 , 216 then process the received data packets to extract one or more data/command messages.
- the extracted data/command messages are passed to the upper layer 210 where the messages are further processed and/or transferred to other modules or devices to be displayed (text or graphics) or played (audio), for example.
- a wireless network may support the communication of various types of data, including voice data, text messages, multimedia messages, streaming video, and application data.
- different data types are treated differently by the network due to the quality of service requirements established for each data type.
- voice data associated with a call need not be entirely accurate, because i) the human auditory system is well-adapted to comprehend a human voice even in imperfect conditions and ii) asking someone to repeat what they just said if the voice data is corrupted is considered a minor inconvenience.
- the communication of a text message may be delayed with minor consequence, as long as the message as transmitted accurately.
- FIG. 3 is a functional block diagram of a transmitter 202 including a packet classifier 209 .
- the transmitter 202 includes an upper layer 210 and a MAC layer 208 .
- the upper layer 210 includes an application layer from which data is communicated to the MAC layer 208 for eventual transmission by the PHY layer 206 .
- the application layer traffic is fed into a packet classifier 209 which classifies each packet according to a traffic type.
- the packet classifier 209 places the packet into a priority queue 310 from which the data is read by the MAC layer 208 .
- a priority queue 310 from which the data is read by the MAC layer 208 .
- the number of priority queues may be different than the number of traffic types, for example, if more than one traffic type is given the same priority.
- the four priority flows can correspond to voice data, video data, background data, and best effort data.
- the priorities are ordered such that voice data has the highest priority, video data has the second highest priority, background data has the third highest priority, and best effort data is assigned the lowest priority.
- the access point 101 is configured to coordinate data transfer between itself and other devices and between two devices by partitioning the wireless channel time into a number of time periods and scheduling communication between specific devices during those time periods.
- FIG. 4 is a timeline 400 showing a plurality of superframes (SF) 405 and their constituent parts, according to one embodiment.
- Each of the superframes 405 may be further partitioned into a beacon period 410 , a contention period 420 , and a data period 430 .
- the superframe may include other suitable periods, such as guard time periods, depending on the design of the network.
- the access point such as the access point 101 of FIG. 1 , transmits beacons to wireless devices.
- a beacon is an electromagnetic waveform from which the devices can retrieve information about the network.
- the beacon may, for example, contain information about the access point or the superframe partitioning, including the start and stop time of superframe partitions.
- a beacon may also contain data indicative previously allocated channel resources, e.g., when a particular device should transmit data to the access point (or another device) or vice versa.
- Beacons may be transmitted omni-directionally or in one or more particular directions. Beacons may be transmitted using any of a number of modulation and coding schemes, and any number of physical layer transmission schemes, including orthogonal frequency division multiplexing (OFDM) and single-carrier transmission.
- OFDM orthogonal frequency division multiplexing
- Beacons may be broadcast, such that any device may receive and interpret the beacon, or they may be addressed to a particular device or group of devices. Beacons transmitted within the beacon period 410 are not necessarily the same size, and thus do not necessarily take the same amount of time to transmit.
- the beacon period 410 may be partitioned into sub-beacon periods, where a beacon is transmitted in one direction by the coordinator during each sub-beacon period.
- the wireless channel can be a random access channel during the contention period 420 .
- Any of a number of random access schemes may be used in the network, including, but not limited to, slotted Aloha, carrier sense multiple access (CSMA), carrier sense multiple access with collision avoidance (CSMA/CA), or preamble sense multiple access (PSMA).
- CSMA carrier sense multiple access
- CSMA/CA carrier sense multiple access with collision avoidance
- PSMA preamble sense multiple access
- collisions may occur when a number of devices transmit data packets simultaneously.
- the wireless devices allocate channel resources by transmitting control packets.
- an RAV resource allocation vector
- Such communication may be particularly useful when channel time is reserved between two devices, neither of them the access point.
- channel allocation messages are typically transmitted during the contention period 420 of a superframe 400
- other messages including MAC commands, may be included in a packet and transmitted during this time.
- devices may transmit data to one another, thereby bypassing the access point during the contention period 420 .
- other control packets besides RAVs may be transmitted from the devices to the access point during the contention period 420 .
- the data period 430 is the time partition reserved for communication between specific devices of the network. During reserved channel time, two devices may efficiently transmit large amounts of data, such as audio or video data. Other non-data functions may also be performed during the reserved time, such as beamforming training or tracking procedures.
- the contention period 420 can be partitioned into a number of sub-periods.
- the contention period 420 is partitioned into one or more superslots 422 .
- Each superslot 422 is associated with a different priority, as defined by the packet classifier 209 of FIG. 3 .
- the superslots 422 are chronologically arranged such that a superslot associated with a higher priority occurs in time before a superslot associated with a lower priority.
- the access point 101 can thus define four superslots 422 during the contention period 420 , each superslot 422 associated with a single priority.
- a station 103 can indicate the traffic types it intends to produce when it associates with the access point. If the access point 101 is connected to a number of stations 103 that produce only traffic of type 1 (associated with priority of 1) and type 4 (associated with a priority of 4), the access point 101 can define only two superslots 422 , each associated with the priority the access point 101 can expect to receive from its associated devices.
- Each superslot 422 can be further partitioned into mini-contention periods 424 .
- each mini-contention period 424 is of a duration long enough to allow a successful round of contention for a data flow. For example, if an access point 101 is connected to a k stations intending to produce a data flow having priority p, the superslot 422 associated with priority p can be partitioned into k mini-contention periods 424 . Thus, under appropriate circumstances, each station can reserve the channel for the data flow having priority p. For instance, priority p equals to 2 out of a total 4 possible priorities in one reference implementation.
- Each mini-contention period 424 can be further partitioned into a number of slots 426 .
- each slot 426 is of a duration long enough to accommodate a single control packet, such as a RTS (Request to Send) or CTS (Clear to Send) packet.
- each slot 426 is not of a duration long enough to accommodate a single control packet, but rather a control packet would occupy multiple slots 426 .
- only a subset of the slots 426 are used for contention, with the remainder of the slots 426 acting as a sort of guard period, to ensure that control packets which begin transmission during a slot 426 associated with a first mini-contention period 424 do not continue transmission during a second mini-contention period 424 .
- the subset of slots 426 used for contention are continuous and called the contention window.
- the mini-contention period 424 can be partitioned into a contention window of one or more slots 424 and a non-contention window of one or more slots 424 .
- Each slot 426 can be further partitioned into a number of mini-slots 428 .
- each mini-slot 426 is approximately the duration of the receive-to-transmit gap as in IEEE 802.11 such that a CCA can be performed to sense the channel if idle and then to switch to the transmit mode.
- the access point such as the access point 101 of FIG. 1 , transmits beacons to wireless devices.
- the beacon can contain information about the access point, the superframe partitioning, including the start and stop times of various superframe partitions, or channel allocation.
- FIG. 5 is a timeline showing a beacon 500 and its constituent parts according to one embodiment.
- the beacon 500 includes information about the superslots 510 , the mini-contention periods 520 , the contention window range 530 , contention allowances 540 , and resource allocation 550 .
- the beacon 500 can include additional or less information than shown in FIG. 5 .
- the beacon 500 includes information about the superslot partitioning 510 , which can include the number of superslots, their respective duration, the start or stop times for each superslot, the priority associated with each superslot, or other information.
- the superslot information 510 can also include the number of mini-contention periods associated with superslot, the number of slots associated with each superslot, or mini-slots associated with each superslot. This information can alternatively be included in the mini-contention period information 520 .
- the contention window information 530 can include information regarding the number of slots in each mini-slot, which slots form the contention window, or other information. For example, the contention window information 530 can indicate a range of slots over which a slot can later be selected.
- the selection process could be uniform random or non-uniform.
- the contention window information 530 is represented as [CWmin, CWmax], where CWmin is a minimum range of minislots and CWmax is a maximum range of slots.
- the contention allowances information 540 can indicate during which superslots a data flow having a specific priority is allowed to contend. For example, the contention allowances information 540 can indicate that during a third superslot, only data flows having a priority 3 can contend. In another embodiment, the contention allowances information 540 can indicate that during the third superslot, only data flows having a priority of 3 or higher can contend. In another embodiment, the contention allowances information 540 can indicate that all data flows can contend during a particular superslot or that certain data flows associated with a subset of the priorities can contend.
- the beacon can also include data regarding resource allocation 550 .
- the resources are represented by a two-dimensional resource map in which a first dimension represents channel time and a second dimension represents frequency or sub-carrier, such as OFDM sub-carriers.
- the resource map can be stored as a matrix, in which the elements indicate whether or not a particular time unit-subcarrier has been allocated or reserved.
- FIG. 6 is a flowchart illustrating a method of allocating channel resources in a wireless data communication network, according to one embodiment.
- the method 600 can be performed by the access point 101 of FIG. 1 .
- the method 600 can be performed by a station 103 , as shown in FIG. 1 .
- the method 600 begins, in block 610 , with the transmission of data indicative of available channel resources.
- the transmission can be accomplished by transmitting a beacon during the beacon period of a superframe. As described above with respect to FIG. 5 , this can include the transmission of a two-dimensional time-frequency resource map 550 .
- the access point 101 can preselect available channel resources for allocation, and transmit data indicative of the preselected resources.
- the method 600 continues to block 620 with the transmission of data indicative of a contention period partitioning.
- the transmission can be accomplished by transmitting a beacon during the beacon period of a superframe.
- the contention period partitioning indicates the partitioning of a contention period into a number of superslots, each associated with a priority. As described above with respect to FIG.
- the contention period partitioning can include transmission of the number of superslots, their respective duration, the start or stop times for each superslot, the priority associated with each superslot, the number of mini-contention periods associated with superslot, the number of slots associated with each superslot, the number of mini-slots associated with each superslot, the number of slots in each mini-slot, which slots form the contention window, or contention allowances.
- blocks 610 and 620 are shown in FIG. 6 and described consecutively, the order may be reversed.
- the transmission in block 620 can be performed before the transmission in block 610 .
- the transmission in block 610 and block 620 can be performed simultaneously or intermittently.
- a beacon can be transmitted containing superslot information, followed by a resource map, followed by contention allowances.
- the method 600 moves to block 640 in which data is received indicative of an allocation of available channel resources.
- a RAV Resource Allocation Vector
- the data is indicative of a selection from a plurality of preselected channel resources.
- the allocation of available channel resources can be received during a superslot or a mini-contention period associated with a particular priority and can indicate that the allocation is for a data flow having the particular priority or a higher priority.
- the RAV frame is transmitted to a group address such that both the peer station 103 and the access point 101 receive and process the RAV frame.
- the method 600 can include additional blocks not shown in FIG.
- control messages involved in contenting the shared channel.
- These control messages can include modified RTS and CTS messages in IEEE 802.11.
- the peer station 103 after receiving the RAV frame, the peer station 103 responds by transmitting an RRAV (Reply RAV).
- An RRAV frame carries the same information as a RAV frame does.
- FIG. 7 is a flowchart illustrating a method of allocating channel resources in a wireless data communication network, according to another embodiment.
- the method is performed during a contention access period.
- the method 700 can be performed by a station 103 of FIG. 1 .
- the method 600 can be performed by an access point 101 , as shown in FIG. 1 .
- the method 700 begins, in block 710 , with the reception of data indicative of available channel resources.
- the reception can be accomplished by receiving a beacon during the beacon period of a superframe. As described above with respect to FIG. 5 , this can include the reception [should it be reception?] of a two-dimensional time-frequency resource map.
- the beacon may indicate preselected channel resources for allocation.
- the method 700 continues to block 720 with the reception of data indicative of a contention period partitioning.
- the transmission can be accomplished by receiving a beacon during the beacon period of a superframe.
- the contention period partitioning indicates the partitioning of a contention period into a number of superslots, each associated with a priority. As described above with respect to FIG.
- the contention period partitioning can include transmission of the number of superslots, their respective duration, the start or stop times for each superslot, the priority associated with each superslot, the number of mini-contention periods associated with superslot, the number of slots associated with each superslot, the number of mini-slots associated with each superslot, the number of slots in each mini-slot, which slots or mini-slots form the contention window, or contention allowances.
- blocks 710 and 720 are shown in FIG. 7 and described consecutively, the order may be reversed.
- the reception in block 720 can be performed before the reception in block 710 .
- the reception in block 710 and block 720 can be performed simultaneously or intermittently.
- a beacon can be received containing superslot information, followed by a resource map, followed by contention allowances.
- the method 700 continues to block 730 in which the priority of a data flow is identified.
- the traffic type of a data flow can be indicated by the program producing the data, or by analysis of the data itself.
- the packet classifier 209 illustrated in FIG. 3 can classify each packet according to the identified data flow, or the data flow can be determined based on the classification performed by the packet classifier 209 .
- data is transmitted indicative of an allocation of available channel resources.
- the data is indicative of a selection from a plurality of preselected channel resources.
- the allocation of available channel resources can be transmitted during a superslot associated with a priority that is the identified priority or is lower than the identified priority.
- the method 700 can include additional blocks not shown in FIG. 6 , including the transmission or reception of content data, such as audio or video data or including the reception of an RRAV.
- a first device such as station 103 in FIG. 1
- the first device classifies the data into various priority queues, thereby associating a priority with each data flow.
- the first device transmits a control packet to the second device (and any other devices of the network) indicative of the allocation.
- the channel time and in particular, the contention period, can be partitioned into a number of sub-contention periods designed superslots, mini-contention periods, slots, and minislots.
- data indicative of this partitioning can be communicated to the first device by a beacon.
- FIG. 8 is a flowchart illustrating a method of allocating channel resources in a wireless data communication network using this partitioning scheme.
- the process 800 which can be performed by the first device, such as a station 103 in FIG. 1 or transmitter 202 in FIG. 2 , begins in block 802 with the determination of the priority (j) of a data flow.
- the data flow can be, for example, voice data, video data, background data, or best effort data.
- the priority can be determined by the packet classifier 209 of FIG. 3 .
- the process 800 continues with the selection of a number (m) between 1 and k, the number of mini-contention periods for the superslot associated with the priority (j) of the data flow.
- the number of mini-contention periods (k) and the superslot associated with the priority of the data flow can be communicated to the first device via a beacon.
- the selection of m can be performed by a random number generator within the first device.
- m can be an instance of a discrete uniform random variable between 1 and k.
- the selection of m is not random, or is random with a non-uniform distribution.
- the selection of m is indicative of a selection of a mini-contention period within the superslot associated with the priority of the dataflow.
- the first device selects a slot backoff (b) between 1 and n, the number of viable slots for the selected mini-contention period.
- the number of viable slots can be communicated to the first device via a beacon.
- the contention window information 530 can indicate a range of slots over which a slot is selected.
- the contention window information 530 is represented as [CWmin, CWmax], where CWmin is a minimum range of minislots and CWmax is a maximum range of slots.
- the selection of b can be performed by a random number generator within the first device.
- b can be an instance of a discrete uniform random variable between 1 and n.
- the selection of b is not random, or is random with a non-uniform distribution. The selection of b is indicative of a selection of a slot within the selected mini-contention period.
- the selection of m is indicative of a selection of a mini-contention period from the k mini-contention periods in the superslot associated with the priority of the data flow.
- the first device waits for the selected mini-contention period to continue the process 800 .
- the process 800 continues in block 812 , where it is determined if the slot, beginning with the first slot of the selected mini-contention period, is busy. If the slot is not busy, the process moves to block 815 , where b is decremented by one. It is then determined, in block 817 , if b is equal to zero. If b is equal to zero, a control packet is transmitted, in block 820 , indicative of an allocation of channel resources. For example, if b is selected, in block 810 , as 1, indicative of a selection of the first available slot, and it is determined, in block 812 , that the slot is not busy, b is decremented by one in block 815 , thereby becoming zero. It is then determined that b is zero in block 817 and the process 800 continues to block 820 , where a control packet is transmitted.
- the process 800 moves to block 822 , where it waits for the next slot before returning to block 812 . In this way, the first device waits b slots in which no channel activity is detected during the selected mini-contention period before transmitting a control packet.
- the process 800 moves to block 825 where it is determined if there are additional mini-contention periods in the superslot associated with the determined priority. If there are additional mini-contention periods in the superslot, the process 800 moves to block 830 where a mini-contention period is selected from the remaining mini-contention periods. The process 800 then continues by returning to block 811 where it waits for the newly selected mini-contention period.
- the process 800 returns to block 811 , and not to block 810 where the slot backoff is selected.
- the backoff, b is unchanged by the determination, in block 812 , that the slot is busy.
- the first device “freezes” the remaining backoff, b, as selected in block 810 and possibly decremented in block 815 . Therefore, if the first device waited a number of slots before it was detected that the slot was busy, the backoff would be decremented by this amount and the first device could potentially transmit sooner than if a backoff were reselected.
- the process 800 moves to block 835 where it is determined if there are additional superslots in the contention period. If there are no additional superslots, the process 800 continues to block 840 where it waits for the next contention period before restarting the process by returning to block 802 . As the priority of the data flow is unchanged, in one embodiment, the process returns to block 805 bypassing a redundant determination of the priority of the data flow.
- the process 800 moves to block 845 , where one of the additional superslots is selected.
- the process 800 continues to block 855 , where, as described with respect to block 805 , a mini-contention period is selected from those in the selected superslot, and then to block 860 , where, as described with respect to block 810 , a slot backoff is selected.
- the process waits, in block 861 , for the selected mini-contention period.
- Blocks 862 , 865 , 867 , 872 , 875 , 880 , 885 , and 890 of the process 800 function, respectively, as blocks 812 , 815 , 817 , 822 , 825 , 830 , 835 , and 840 described above.
- the key difference is that when it is determined, in block 817 , that b is equal to zero, a control packet is transmitted.
- the process moves to block 891 where a mini-slot backoff (d) is selected based on the priority and the selected superslot.
- the mini-slot backoff (d) linearly increases with the decrease in priority order. As described above, if the priority associated with the selected superslot is the same as the priority of the data flow, there is no mini-slot backoff and a control packet is transmitted immediately. If the priority associated with the selected superslot is different than the priority of the data flow, a mini-slot backoff is selected. In one embodiment, the highest priority data flow is given a mini-slot backoff of one mini-slot, the second highest priority data flow is given a mini-slot backoff of two mini-slots, and so on.
- the process continues to black 892 where it is determined if the mini-slot, beginning with the first mini-slot, is busy. If the mini-slot is busy, the process moves to block 875 . If the mini-slot is not busy, the process moves to block 893 , where d is decremented by one. If it is determined that d is equal to zero, in block 894 , a control packet is transmitted. If it is determined that d is not equal to zero, in block 894 , the process waits, in block 895 , for the next mini-slot before returning to block 892 .
- transmission of a control packet includes transmitting a RTS (Request to Send) packet to a second device, receiving a CTS (Clear to Send) packet from the second device, transmitting an RAV (Resource Allocation Vector) packet to the second device, and receiving an RRAV (Reply Resource Allocation Vector) packet from the second device.
- the RTS and CTS packets can be used to estimate the quality of the subcarriers at both the first device and the second device.
- the RAV packet can include two-dimensional resource allocation based on the RTS/CTS control frame exchange.
- the first dimension can be frequency sub-carrier and the second dimension can be a time unit selected based on the queue size, throughput requirements, and available subcarriers.
- high priority flows are able to reserve subcarriers ahead of low priority flows, high quality subcarriers (e.g., as measured by signal-to-noise ratio (SNR)), can be allocated to high priority traffic. This helps to improve overall system quality.
- SNR signal-to-noise ratio
- the duration of the reserved resources e.g, sub-carriers and time units
- a data flow associated with a priority b can only reserve resources for m superframes
- a data flow associated with a priority q can reserve them for n superframes, where q>b and n>m.
Abstract
Description
Claims (34)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/455,438 US8670395B2 (en) | 2008-06-26 | 2009-06-01 | System and method for priority driven contention scheme for supporting enhanced QoS in a wireless communication network |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7601508P | 2008-06-26 | 2008-06-26 | |
US12/455,438 US8670395B2 (en) | 2008-06-26 | 2009-06-01 | System and method for priority driven contention scheme for supporting enhanced QoS in a wireless communication network |
Publications (2)
Publication Number | Publication Date |
---|---|
US20090323611A1 US20090323611A1 (en) | 2009-12-31 |
US8670395B2 true US8670395B2 (en) | 2014-03-11 |
Family
ID=41447309
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/455,438 Expired - Fee Related US8670395B2 (en) | 2008-06-26 | 2009-06-01 | System and method for priority driven contention scheme for supporting enhanced QoS in a wireless communication network |
Country Status (1)
Country | Link |
---|---|
US (1) | US8670395B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10462813B2 (en) * | 2010-01-15 | 2019-10-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for contention-based granting in a wireless communication network |
US10887918B2 (en) | 2017-09-25 | 2021-01-05 | Apple Inc. | Enhanced Wi-Fi access protocol (EWAP) |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7944897B2 (en) | 2005-11-03 | 2011-05-17 | Samsung Electronics Co., Ltd. | Method and system for addressing channel access unfairness in IEEE 802.11n wireless networks |
US8208392B2 (en) * | 2007-08-13 | 2012-06-26 | Samsung Electronics Co., Ltd. | System and method for peer-to-peer beam discovery and communication in infrastructure based wireless networks using directional antennas |
US8917675B2 (en) * | 2007-08-20 | 2014-12-23 | Samsung Electronics Co., Ltd. | System and method for multiple contention access periods |
US8824495B2 (en) * | 2008-07-02 | 2014-09-02 | Samsung Electronics Co., Ltd. | System and method for reservation of disjoint time intervals in wireless local area networks |
US8817676B2 (en) * | 2008-11-03 | 2014-08-26 | Samsung Electronics Co., Ltd. | Method and system for station-to-station directional wireless communication |
US8385362B2 (en) * | 2009-01-09 | 2013-02-26 | Samsung Electronics Co., Ltd. | Method and system for contention-based medium access schemes for directional wireless transmission with asymmetric antenna system (AAS) in wireless communication systems |
CA2771881C (en) | 2009-02-18 | 2016-05-24 | Lg Electronics Inc. | Method of controlling channel access |
WO2010103415A1 (en) * | 2009-03-09 | 2010-09-16 | Koninklijke Philips Electronics N.V. | Method for controlling medium access in a mesh network using allocation vectors and station carrying out such method |
US8724598B1 (en) * | 2009-12-07 | 2014-05-13 | The United States Of America As Represented By The Secretary Of The Navy | Method for energy-efficient, traffic-adaptive, flow-specific medium access for wireless networks |
US9173191B2 (en) | 2009-12-20 | 2015-10-27 | Intel Corporation | Device, system and method of simultaneously communicating with a group of wireless communication devices |
US8374154B2 (en) * | 2009-12-23 | 2013-02-12 | Intel Corporation | Device, system and method of simultaneously communicating with a group of wireless communication devices |
EP2561625B1 (en) | 2010-04-19 | 2021-12-15 | Samsung Electronics Co., Ltd. | Method and system for multi-user transmit opportunity for multi-user multiple-input-multiple-output wireless networks |
US8526317B2 (en) | 2010-05-27 | 2013-09-03 | Qualcomm Incorporated | Methods and apparatus for preemptive backoff for medium access in wireless peer-to-peer networks |
US9706581B2 (en) | 2010-05-31 | 2017-07-11 | Blackberry Limited | Method and apparatus for back-off algorithm having different retry time classes |
US8289985B1 (en) * | 2010-06-23 | 2012-10-16 | L-3 Communications, Corp. | Waveform-independent contention access in a wireless hub-spoke network using IP packets |
US8953578B2 (en) | 2010-06-23 | 2015-02-10 | Samsung Electronics Co., Ltd. | Method and system for contention avoidance in multi-user multiple-input-multiple-output wireless networks |
US9232543B2 (en) | 2010-07-07 | 2016-01-05 | Samsung Electronics Co., Ltd. | Method and system for communication in multi-user multiple-input-multiple-output wireless networks |
CN102484880A (en) * | 2010-07-07 | 2012-05-30 | 松下电器产业株式会社 | Communication apparatus, communication terminal apparatus, communication system and communication method |
US8917743B2 (en) | 2010-10-06 | 2014-12-23 | Samsung Electronics Co., Ltd. | Method and system for enhanced contention avoidance in multi-user multiple-input-multiple-output wireless networks |
US9992796B2 (en) | 2011-09-20 | 2018-06-05 | Futurewei Technologies, Inc. | System and method for managing contention in a wireless communications system |
US8917705B2 (en) * | 2011-09-29 | 2014-12-23 | Qualcomm Incorporated | Collision reduction mechanisms for wireless communication networks |
US9379868B2 (en) * | 2011-12-05 | 2016-06-28 | Broadcom Corporation | Subsequent association identifier (AID) update within single user, multiple user, multiple access, and/or MIMO wireless communications |
US20130229959A1 (en) * | 2012-03-01 | 2013-09-05 | Nokia Corporation | Method and apparatus for group synchronized channel access with tim segmentation |
US20130229988A1 (en) * | 2012-03-01 | 2013-09-05 | Nokia Corporation | Method and Apparatus for Synchronized Channel Access Among Groups |
GB2500178A (en) * | 2012-03-09 | 2013-09-18 | Renesas Mobile Corp | Grouping wireless communication devices based on downlink quality |
KR20130124425A (en) * | 2012-05-04 | 2013-11-13 | 한국전자통신연구원 | Method and apparatus for controlling access in wireless network |
WO2013171653A1 (en) * | 2012-05-14 | 2013-11-21 | Renesas Mobile Corporation | Method and apparatus for signalling in wireless communication systems |
US9019874B2 (en) * | 2012-06-27 | 2015-04-28 | Nokia Corporation | Method, apparatus, and computer program product for resolving hidden node in synchronized DCF based channel access |
US9232502B2 (en) | 2012-10-31 | 2016-01-05 | Samsung Electronics Co., Ltd. | Method and system for uplink multi-user multiple-input-multiple-output communication in wireless networks |
US9419752B2 (en) | 2013-03-15 | 2016-08-16 | Samsung Electronics Co., Ltd. | Transmission opportunity operation of uplink multi-user multiple-input-multiple-output communication in wireless networks |
US9295074B2 (en) | 2013-09-10 | 2016-03-22 | Samsung Electronics Co., Ltd. | Acknowledgement, error recovery and backoff operation of uplink multi-user multiple-input-multiple-output communication in wireless networks |
US20150124843A1 (en) * | 2013-11-04 | 2015-05-07 | Shahrnaz Azizi | Shortened training field preamble structure for high efficiency wi-fi environment |
GB2534829B (en) * | 2013-12-12 | 2021-03-17 | Arris Entpr Llc | Wireless access point transmission control |
SG11201808379PA (en) * | 2016-03-31 | 2018-10-30 | Agency Science Tech & Res | Method and device for mesh routing in a channel-diverse mesh network |
EP3678442B1 (en) * | 2017-09-27 | 2023-07-26 | Huawei Technologies Co., Ltd. | Multi-beam polling based transmission method and communication device |
US11363629B2 (en) * | 2020-07-31 | 2022-06-14 | Huawei Technologies Canada Co., Ltd. | Method, apparatus and system for medium access control |
Citations (94)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5615212A (en) * | 1995-09-11 | 1997-03-25 | Motorola Inc. | Method, device and router for providing a contention-based reservation mechanism within a mini-slotted dynamic entry polling slot supporting multiple service classes |
US5886993A (en) * | 1997-05-30 | 1999-03-23 | Motorola, Inc. | System, device, and method for sharing contention mini-slots among multiple priority classes |
US6198728B1 (en) * | 1996-12-19 | 2001-03-06 | Phillips Electronics North America Corp. | Medium access control (MAC) protocol for wireless ATM |
US20020057709A1 (en) * | 1998-04-15 | 2002-05-16 | Edmon Eugene L. | Method and apparatus enabling multiple access on a broadband communication network |
US20030003905A1 (en) | 2001-06-20 | 2003-01-02 | Shvodian William M. | System and method for providing signal quality feedback in a wireless network |
US20030137970A1 (en) | 2002-01-22 | 2003-07-24 | Odman Knut T. | System and method for improved synchronization in a wireless network |
US20030137993A1 (en) | 2002-01-22 | 2003-07-24 | Odman Knut T. | Method of managing time slots in a wireless network through the use of contention groups |
US20030152059A1 (en) | 2002-01-22 | 2003-08-14 | Odman Knut T. | System and method for handling asynchronous data in a wireless network |
US20030214928A1 (en) * | 1997-10-14 | 2003-11-20 | Chuah Mooi Choo | Method for paging a device in a wireless network |
US20030214967A1 (en) | 2002-05-17 | 2003-11-20 | Heberling Allen D. | Method of remote channel quality determination |
US20040047319A1 (en) | 2002-09-06 | 2004-03-11 | Johannes Elg | Contention-based medium access control for ad hoc wireless piconets |
US20040053621A1 (en) | 2002-07-05 | 2004-03-18 | Shigeru Sugaya | Radio communication system, radio communication apparatus, radio communication method, and computer program |
US6795421B1 (en) | 2002-02-12 | 2004-09-21 | Nokia Corporation | Short-range RF access point design enabling services to master and slave mobile devices |
US20040199686A1 (en) | 2003-04-03 | 2004-10-07 | Jeyhan Karaoguz | Providing link quality intelligence from physical layer to higher protocol layers |
US6807158B2 (en) | 2001-08-07 | 2004-10-19 | Hrl Laboratories, Llc | Method and apparatus for determining position and trajectory of gateways to optimize performance in hybrid non-terrestrial-terrestrial multi-hop mobile networks |
US20040214571A1 (en) | 2003-04-25 | 2004-10-28 | Samsung Electronics Co., Ltd. | System and method for managing the association of device with a piconet |
US20040218683A1 (en) | 2003-05-01 | 2004-11-04 | Texas Instruments Incorporated | Multi-mode wireless devices having reduced-mode receivers |
US20040264475A1 (en) | 2003-06-30 | 2004-12-30 | The Nature Of The Conveyance | Class of high throughput MAC architectures for multi-channel CSMA systems |
US6868072B1 (en) * | 1999-03-19 | 2005-03-15 | Broadcom Corporation | Home phone line network architecture |
US20050058151A1 (en) | 2003-06-30 | 2005-03-17 | Chihsiang Yeh | Method of interference management for interference/collision avoidance and spatial reuse enhancement |
US20050130634A1 (en) | 2003-10-31 | 2005-06-16 | Globespanvirata, Inc. | Location awareness in wireless networks |
US20050135318A1 (en) | 2003-10-15 | 2005-06-23 | Qualcomm Incorporated | High speed media access control with legacy system interoperability |
US6925064B2 (en) | 2003-09-11 | 2005-08-02 | Motorola, Inc. | Method and apparatus for discovering neighbors within a piconet communication system |
US20050232275A1 (en) | 2004-03-12 | 2005-10-20 | Stephens Adrian P | Legacy device fairness apparatus, systems, and methods |
US20060002428A1 (en) | 2004-06-30 | 2006-01-05 | Trainin Solomon B | System, method and device for wireless transmission |
US20060050742A1 (en) | 2004-08-12 | 2006-03-09 | Interdigital Technology Corporation | Method and system for controlling access to a wireless communication medium |
US7079812B2 (en) | 2002-05-16 | 2006-07-18 | Cognio, Inc. | Systems and methods for interference mitigation with respect to periodic interferers in short-range wireless applications |
US20060166683A1 (en) | 2005-01-26 | 2006-07-27 | Sharma Sanjeev K | Method and system for use of the same time slot of the same channel by multiple pairs of devices via a direct link protocol |
US7088702B2 (en) | 2001-10-03 | 2006-08-08 | Freescale Semiconductor Inc. | Method for controlling a data stream in a wireless network |
US20060176908A1 (en) | 2005-02-07 | 2006-08-10 | Samsung Electronics Co., Ltd. | Method and apparatus for determining ACK frame to acknowledge receipt of transmission frame on a WLAN |
US20060193279A1 (en) | 2005-02-25 | 2006-08-31 | Daqing Gu | Method and system for accessing a channel in a wireless communications network using multi-polling |
US7127254B2 (en) | 2002-03-11 | 2006-10-24 | Freescale Semiconductor, Inc. | Method of using sub-rate slots in an ultrawide bandwidth system |
US20060268800A1 (en) | 2005-05-10 | 2006-11-30 | Shigeru Sugaya | Wireless communication system, wireless communication apparatus, wireless communication method, and computer program |
US20060280200A1 (en) * | 2005-06-13 | 2006-12-14 | Lane Frank A | Basestation methods and apparatus for supporting timing synchronization |
US20060285516A1 (en) | 2003-05-12 | 2006-12-21 | Hui Li | Method for an random accesses in a local network |
US7184767B2 (en) | 2001-11-28 | 2007-02-27 | Freescale Semiconductor, Inc. | System and method of communication between multiple point-coordinated wireless networks |
US20070116035A1 (en) | 2005-11-03 | 2007-05-24 | Samsung Electronics Co., Ltd. | Method and system for addressing channel access unfairness in IEEE 802.11n wireless networks |
US7251235B2 (en) | 2002-06-12 | 2007-07-31 | Conexant, Inc. | Event-based multichannel direct link |
US7280518B2 (en) | 2001-10-03 | 2007-10-09 | Freescale Semiconductor, Inc. | Method of operating a media access controller |
US7280801B2 (en) | 2002-12-02 | 2007-10-09 | Agere Systems Inc. | Reducing interference between different communication systems sharing a common wireless transmission medium |
US20070280180A1 (en) | 2004-06-08 | 2007-12-06 | Koninklijke Philips Electronics, N.V. | Wireless Communication System, Wireless Communication Device for Use as a Station in a Wireless Communication System, a Method of Communication Within a Wireless Communication System |
US7339916B2 (en) | 2005-02-07 | 2008-03-04 | Samsung Electronics Co., Ltd. | Method of determining transmission rate of control response frame for acknowledging data receipt in wireless LAN |
US7356341B2 (en) | 2003-12-04 | 2008-04-08 | Qualcomm, Incorporated | Scheduling communications in a wireless network |
US7359398B2 (en) | 2002-07-01 | 2008-04-15 | Sony Corporation | Wireless communication system, wireless communication device and method, and computer program |
US7385943B2 (en) * | 2001-05-22 | 2008-06-10 | Alcatel | Method of allocating communication resources in an MF-TDMA telecommunication system |
US7388833B2 (en) | 2004-06-04 | 2008-06-17 | Mitsubishi Electric Research Laboratories, Inc. | Access control and protocol for packet switched wireless communications networks |
US20080159208A1 (en) * | 2006-12-28 | 2008-07-03 | Motorola, Inc. | Method and apparatus for allocation of shared spectrum in a wireless communication system |
US7400899B2 (en) | 2003-10-30 | 2008-07-15 | Electronics And Telecommunications Research Institute | Method for controlling power level based on packet error rate in wireless personal area network system |
US7447180B2 (en) * | 2004-02-13 | 2008-11-04 | Samsung Electronics Co., Ltd. | Wireless media access method |
US7447174B2 (en) | 2006-01-10 | 2008-11-04 | Meshnetworks, Inc. | System and method for detecting node mobility based on network topology changes in a wireless communication network |
US20080279204A1 (en) * | 2007-04-13 | 2008-11-13 | Hart Communication Foundation | Increasing Reliability and Reducing Latency in a Wireless Network |
US20080291873A1 (en) | 2001-07-05 | 2008-11-27 | Mathilde Benveniste | Hybrid coordination function (hcf) access through tiered contention and overlapped wireless cell mitigation |
US7474686B2 (en) | 2003-02-28 | 2009-01-06 | Texas Instruments Incorporated | Wireless personal area networks with rotation of frequency hopping sequences |
US7480266B2 (en) | 2004-11-30 | 2009-01-20 | Intel Corporation | Interference adaptation apparatus, systems, and methods |
US7486650B2 (en) | 2004-09-27 | 2009-02-03 | Intel Corporation | Method, apparatus and system of wireless transmission |
US20090052389A1 (en) | 2007-08-20 | 2009-02-26 | Samsung Electronics Co., Ltd. | System and method for multiple contention access periods |
US20090086706A1 (en) | 2007-10-01 | 2009-04-02 | The Hong Kong University Of Science And Technology | Cross-layer multi-packet reception based medium access control and resource allocation |
US20090092086A1 (en) * | 2006-01-06 | 2009-04-09 | Ju-Ho Lee | Apparatus for transmitting data on contention based resource in radio communication system and method thereof |
US7539930B2 (en) | 2005-09-28 | 2009-05-26 | Intel Corporation | System, method and apparatus of protecting a wireless transmission |
US7545771B2 (en) | 2003-01-29 | 2009-06-09 | Xocyst Transfer Ag L.L.C. | Independent direct link protocol |
US7561510B2 (en) | 2004-04-30 | 2009-07-14 | Sharp Kabushiki Kaisha | Wireless LAN system |
US7570656B2 (en) * | 2001-06-18 | 2009-08-04 | Yitran Communications Ltd. | Channel access method for powerline carrier based media access control protocol |
US7590078B2 (en) | 2004-10-05 | 2009-09-15 | Qualcomm Incorporated | Detecting legacy spoofing in reduced functionality user terminals |
US20090275292A1 (en) | 2008-05-02 | 2009-11-05 | Soo-Young Chang | System and Method for Wireless Communications |
US20090285163A1 (en) * | 2005-12-08 | 2009-11-19 | Hang Zhang | Resource Assignment Systems and Methods |
US7623542B2 (en) * | 2002-10-21 | 2009-11-24 | Intellon Corporation | Contention-free access intervals on a CSMA network |
US7634275B2 (en) | 2002-07-03 | 2009-12-15 | Freescale Semiconductor, Inc. | Method of accommodating periodic interfering signals in a wireless network |
US20100002639A1 (en) | 2008-07-02 | 2010-01-07 | Samsung Electronics Co., Ltd. | System and method for reservation of disjoint time intervals in wireless local area networks |
US7664132B2 (en) | 2001-01-02 | 2010-02-16 | At&T Corp. | Random medium access methods with backoff adaptation to traffic |
US20100046518A1 (en) | 2004-01-09 | 2010-02-25 | Kabushiki Kaisha Toshiba | Communication apparatus, communication method, and communication system |
US20100046453A1 (en) | 2008-08-19 | 2010-02-25 | Qualcomm Incorporated | Methods and apparatus for frame exchange for sdma uplink data |
US7680150B2 (en) | 2004-04-13 | 2010-03-16 | Texas Instruments Incorporated | Virtual clear channel avoidance (CCA) mechanism for wireless communications |
US7787487B2 (en) | 2003-09-30 | 2010-08-31 | Intel Corporation | Systems and methods for contention control in wireless networks |
US20100220601A1 (en) | 2009-02-27 | 2010-09-02 | Qualcomm Incorporated | Method and apparatus for scheduling transmissions in spatial division multiple access network systems |
US20100310003A1 (en) | 2009-06-05 | 2010-12-09 | Broadcom Corporation | Transmission acknowledgment within multiple user, multiple access, and/or mimo wireless communications |
US7860054B2 (en) | 2005-07-26 | 2010-12-28 | Avaya Inc. | Method and apparatus for using single-radio nodes and multi-radio nodes in a network |
US20110002319A1 (en) | 2008-03-04 | 2011-01-06 | Koninklijke Philips Electronics N.V. | Signaling of transmission settings in multi-user systems |
US20110064013A1 (en) | 2008-06-23 | 2011-03-17 | Hang Liu | Collision mitigation for multicast transmission in wireless local area networks |
US7924805B2 (en) | 2004-04-23 | 2011-04-12 | Kabushiki Kaisha Toshiba | Communication apparatus, communication system, and communication control program |
US20110090855A1 (en) | 2009-10-20 | 2011-04-21 | Electronics And Telecommunications Research Institute | Method for managing resources in high capacity wireless communication system |
US20110176627A1 (en) | 2010-01-15 | 2011-07-21 | Cheng-Hsuan Wu | Multi-user Transmission Method, Multiple Input Multiple Output Transmission System Using the Same, Scheduling Method and Access Point Using the Same |
US20110235513A1 (en) | 2004-01-08 | 2011-09-29 | Interdigital Technology Corporation | Packet scheduling in a wireless local area network |
US20110255618A1 (en) | 2010-04-19 | 2011-10-20 | Samsung Electronics Co., Ltd. | Method and system for multi-user transmit opportunity for multi-user multiple-input-multiple-output wireless networks |
US8072961B2 (en) | 2003-04-28 | 2011-12-06 | Sony Corporation | Communication system, a communication method, and a communication apparatus with request to send features |
US20110317630A1 (en) | 2010-06-23 | 2011-12-29 | Chunhui Zhu | Method and system for contention avoidance in multi-user multiple-input-multiple-output wireless networks |
US8089946B2 (en) | 2002-11-19 | 2012-01-03 | Collision Technology, LLC | Bandwidth efficient wireless network modem |
US20120008490A1 (en) | 2010-07-07 | 2012-01-12 | Samsung Electronics Co., Ltd. | Method and system for communication in multi-user multiple-input-multiple-output wireless networks |
US20120082200A1 (en) | 2009-06-12 | 2012-04-05 | Fundacio Privada Centre Tecnologic De Telecomunicacions De Catalunya | Method and apparatus for medium access control in a wireless broadband system with multiple-input multiple-output or multiple-input single-output technology with multiuser capabilities |
US20120087358A1 (en) | 2010-10-06 | 2012-04-12 | Chunhui Zhu | Method and system for enhanced contention avoidance in multi-user multiple-input-multiple-output wireless networks |
US8179867B2 (en) | 2008-05-09 | 2012-05-15 | Lg Electronics Inc. | Apparatus and method for transmission opportunity in mesh network |
US20120140615A1 (en) | 2010-12-03 | 2012-06-07 | Gong Michelle X | Method, station and computer readable medium for downlink multi-user multiple access category medium access and error recovery |
US20120218947A1 (en) | 2010-08-31 | 2012-08-30 | Qualcomm Incorporated | Rules for multiplexing data of different access categories in multi user mimo wireless systems |
US20120314694A1 (en) | 2011-06-07 | 2012-12-13 | Jing-Rong Hsieh | Method of Back-off Procedure Setup in a Wireless Communication System |
US8532221B2 (en) | 2010-02-10 | 2013-09-10 | Marvell World Trade Ltd. | Transmission protection for wireless communications |
-
2009
- 2009-06-01 US US12/455,438 patent/US8670395B2/en not_active Expired - Fee Related
Patent Citations (94)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5615212A (en) * | 1995-09-11 | 1997-03-25 | Motorola Inc. | Method, device and router for providing a contention-based reservation mechanism within a mini-slotted dynamic entry polling slot supporting multiple service classes |
US6198728B1 (en) * | 1996-12-19 | 2001-03-06 | Phillips Electronics North America Corp. | Medium access control (MAC) protocol for wireless ATM |
US5886993A (en) * | 1997-05-30 | 1999-03-23 | Motorola, Inc. | System, device, and method for sharing contention mini-slots among multiple priority classes |
US20030214928A1 (en) * | 1997-10-14 | 2003-11-20 | Chuah Mooi Choo | Method for paging a device in a wireless network |
US20020057709A1 (en) * | 1998-04-15 | 2002-05-16 | Edmon Eugene L. | Method and apparatus enabling multiple access on a broadband communication network |
US6868072B1 (en) * | 1999-03-19 | 2005-03-15 | Broadcom Corporation | Home phone line network architecture |
US7664132B2 (en) | 2001-01-02 | 2010-02-16 | At&T Corp. | Random medium access methods with backoff adaptation to traffic |
US7385943B2 (en) * | 2001-05-22 | 2008-06-10 | Alcatel | Method of allocating communication resources in an MF-TDMA telecommunication system |
US7570656B2 (en) * | 2001-06-18 | 2009-08-04 | Yitran Communications Ltd. | Channel access method for powerline carrier based media access control protocol |
US20030003905A1 (en) | 2001-06-20 | 2003-01-02 | Shvodian William M. | System and method for providing signal quality feedback in a wireless network |
US20080291873A1 (en) | 2001-07-05 | 2008-11-27 | Mathilde Benveniste | Hybrid coordination function (hcf) access through tiered contention and overlapped wireless cell mitigation |
US6807158B2 (en) | 2001-08-07 | 2004-10-19 | Hrl Laboratories, Llc | Method and apparatus for determining position and trajectory of gateways to optimize performance in hybrid non-terrestrial-terrestrial multi-hop mobile networks |
US7088702B2 (en) | 2001-10-03 | 2006-08-08 | Freescale Semiconductor Inc. | Method for controlling a data stream in a wireless network |
US7280518B2 (en) | 2001-10-03 | 2007-10-09 | Freescale Semiconductor, Inc. | Method of operating a media access controller |
US7184767B2 (en) | 2001-11-28 | 2007-02-27 | Freescale Semiconductor, Inc. | System and method of communication between multiple point-coordinated wireless networks |
US20030137993A1 (en) | 2002-01-22 | 2003-07-24 | Odman Knut T. | Method of managing time slots in a wireless network through the use of contention groups |
US20030152059A1 (en) | 2002-01-22 | 2003-08-14 | Odman Knut T. | System and method for handling asynchronous data in a wireless network |
US20030137970A1 (en) | 2002-01-22 | 2003-07-24 | Odman Knut T. | System and method for improved synchronization in a wireless network |
US6795421B1 (en) | 2002-02-12 | 2004-09-21 | Nokia Corporation | Short-range RF access point design enabling services to master and slave mobile devices |
US7127254B2 (en) | 2002-03-11 | 2006-10-24 | Freescale Semiconductor, Inc. | Method of using sub-rate slots in an ultrawide bandwidth system |
US7079812B2 (en) | 2002-05-16 | 2006-07-18 | Cognio, Inc. | Systems and methods for interference mitigation with respect to periodic interferers in short-range wireless applications |
US20030214967A1 (en) | 2002-05-17 | 2003-11-20 | Heberling Allen D. | Method of remote channel quality determination |
US7251235B2 (en) | 2002-06-12 | 2007-07-31 | Conexant, Inc. | Event-based multichannel direct link |
US7359398B2 (en) | 2002-07-01 | 2008-04-15 | Sony Corporation | Wireless communication system, wireless communication device and method, and computer program |
US7634275B2 (en) | 2002-07-03 | 2009-12-15 | Freescale Semiconductor, Inc. | Method of accommodating periodic interfering signals in a wireless network |
US20040053621A1 (en) | 2002-07-05 | 2004-03-18 | Shigeru Sugaya | Radio communication system, radio communication apparatus, radio communication method, and computer program |
US20040047319A1 (en) | 2002-09-06 | 2004-03-11 | Johannes Elg | Contention-based medium access control for ad hoc wireless piconets |
US7623542B2 (en) * | 2002-10-21 | 2009-11-24 | Intellon Corporation | Contention-free access intervals on a CSMA network |
US8089946B2 (en) | 2002-11-19 | 2012-01-03 | Collision Technology, LLC | Bandwidth efficient wireless network modem |
US7280801B2 (en) | 2002-12-02 | 2007-10-09 | Agere Systems Inc. | Reducing interference between different communication systems sharing a common wireless transmission medium |
US7545771B2 (en) | 2003-01-29 | 2009-06-09 | Xocyst Transfer Ag L.L.C. | Independent direct link protocol |
US7474686B2 (en) | 2003-02-28 | 2009-01-06 | Texas Instruments Incorporated | Wireless personal area networks with rotation of frequency hopping sequences |
US20040199686A1 (en) | 2003-04-03 | 2004-10-07 | Jeyhan Karaoguz | Providing link quality intelligence from physical layer to higher protocol layers |
US20040214571A1 (en) | 2003-04-25 | 2004-10-28 | Samsung Electronics Co., Ltd. | System and method for managing the association of device with a piconet |
US8072961B2 (en) | 2003-04-28 | 2011-12-06 | Sony Corporation | Communication system, a communication method, and a communication apparatus with request to send features |
US20040218683A1 (en) | 2003-05-01 | 2004-11-04 | Texas Instruments Incorporated | Multi-mode wireless devices having reduced-mode receivers |
US20060285516A1 (en) | 2003-05-12 | 2006-12-21 | Hui Li | Method for an random accesses in a local network |
US20050058151A1 (en) | 2003-06-30 | 2005-03-17 | Chihsiang Yeh | Method of interference management for interference/collision avoidance and spatial reuse enhancement |
US20040264475A1 (en) | 2003-06-30 | 2004-12-30 | The Nature Of The Conveyance | Class of high throughput MAC architectures for multi-channel CSMA systems |
US6925064B2 (en) | 2003-09-11 | 2005-08-02 | Motorola, Inc. | Method and apparatus for discovering neighbors within a piconet communication system |
US7787487B2 (en) | 2003-09-30 | 2010-08-31 | Intel Corporation | Systems and methods for contention control in wireless networks |
US20050135318A1 (en) | 2003-10-15 | 2005-06-23 | Qualcomm Incorporated | High speed media access control with legacy system interoperability |
US7400899B2 (en) | 2003-10-30 | 2008-07-15 | Electronics And Telecommunications Research Institute | Method for controlling power level based on packet error rate in wireless personal area network system |
US20050130634A1 (en) | 2003-10-31 | 2005-06-16 | Globespanvirata, Inc. | Location awareness in wireless networks |
US7356341B2 (en) | 2003-12-04 | 2008-04-08 | Qualcomm, Incorporated | Scheduling communications in a wireless network |
US20110235513A1 (en) | 2004-01-08 | 2011-09-29 | Interdigital Technology Corporation | Packet scheduling in a wireless local area network |
US20100046518A1 (en) | 2004-01-09 | 2010-02-25 | Kabushiki Kaisha Toshiba | Communication apparatus, communication method, and communication system |
US7447180B2 (en) * | 2004-02-13 | 2008-11-04 | Samsung Electronics Co., Ltd. | Wireless media access method |
US20050232275A1 (en) | 2004-03-12 | 2005-10-20 | Stephens Adrian P | Legacy device fairness apparatus, systems, and methods |
US7680150B2 (en) | 2004-04-13 | 2010-03-16 | Texas Instruments Incorporated | Virtual clear channel avoidance (CCA) mechanism for wireless communications |
US7924805B2 (en) | 2004-04-23 | 2011-04-12 | Kabushiki Kaisha Toshiba | Communication apparatus, communication system, and communication control program |
US7561510B2 (en) | 2004-04-30 | 2009-07-14 | Sharp Kabushiki Kaisha | Wireless LAN system |
US7388833B2 (en) | 2004-06-04 | 2008-06-17 | Mitsubishi Electric Research Laboratories, Inc. | Access control and protocol for packet switched wireless communications networks |
US20070280180A1 (en) | 2004-06-08 | 2007-12-06 | Koninklijke Philips Electronics, N.V. | Wireless Communication System, Wireless Communication Device for Use as a Station in a Wireless Communication System, a Method of Communication Within a Wireless Communication System |
US20060002428A1 (en) | 2004-06-30 | 2006-01-05 | Trainin Solomon B | System, method and device for wireless transmission |
US20060050742A1 (en) | 2004-08-12 | 2006-03-09 | Interdigital Technology Corporation | Method and system for controlling access to a wireless communication medium |
US7486650B2 (en) | 2004-09-27 | 2009-02-03 | Intel Corporation | Method, apparatus and system of wireless transmission |
US7590078B2 (en) | 2004-10-05 | 2009-09-15 | Qualcomm Incorporated | Detecting legacy spoofing in reduced functionality user terminals |
US7480266B2 (en) | 2004-11-30 | 2009-01-20 | Intel Corporation | Interference adaptation apparatus, systems, and methods |
US20060166683A1 (en) | 2005-01-26 | 2006-07-27 | Sharma Sanjeev K | Method and system for use of the same time slot of the same channel by multiple pairs of devices via a direct link protocol |
US20060176908A1 (en) | 2005-02-07 | 2006-08-10 | Samsung Electronics Co., Ltd. | Method and apparatus for determining ACK frame to acknowledge receipt of transmission frame on a WLAN |
US7339916B2 (en) | 2005-02-07 | 2008-03-04 | Samsung Electronics Co., Ltd. | Method of determining transmission rate of control response frame for acknowledging data receipt in wireless LAN |
US20060193279A1 (en) | 2005-02-25 | 2006-08-31 | Daqing Gu | Method and system for accessing a channel in a wireless communications network using multi-polling |
US20060268800A1 (en) | 2005-05-10 | 2006-11-30 | Shigeru Sugaya | Wireless communication system, wireless communication apparatus, wireless communication method, and computer program |
US20060280200A1 (en) * | 2005-06-13 | 2006-12-14 | Lane Frank A | Basestation methods and apparatus for supporting timing synchronization |
US7860054B2 (en) | 2005-07-26 | 2010-12-28 | Avaya Inc. | Method and apparatus for using single-radio nodes and multi-radio nodes in a network |
US7539930B2 (en) | 2005-09-28 | 2009-05-26 | Intel Corporation | System, method and apparatus of protecting a wireless transmission |
US20070116035A1 (en) | 2005-11-03 | 2007-05-24 | Samsung Electronics Co., Ltd. | Method and system for addressing channel access unfairness in IEEE 802.11n wireless networks |
US20090285163A1 (en) * | 2005-12-08 | 2009-11-19 | Hang Zhang | Resource Assignment Systems and Methods |
US20090092086A1 (en) * | 2006-01-06 | 2009-04-09 | Ju-Ho Lee | Apparatus for transmitting data on contention based resource in radio communication system and method thereof |
US7447174B2 (en) | 2006-01-10 | 2008-11-04 | Meshnetworks, Inc. | System and method for detecting node mobility based on network topology changes in a wireless communication network |
US20080159208A1 (en) * | 2006-12-28 | 2008-07-03 | Motorola, Inc. | Method and apparatus for allocation of shared spectrum in a wireless communication system |
US20080279204A1 (en) * | 2007-04-13 | 2008-11-13 | Hart Communication Foundation | Increasing Reliability and Reducing Latency in a Wireless Network |
US20090052389A1 (en) | 2007-08-20 | 2009-02-26 | Samsung Electronics Co., Ltd. | System and method for multiple contention access periods |
US20090086706A1 (en) | 2007-10-01 | 2009-04-02 | The Hong Kong University Of Science And Technology | Cross-layer multi-packet reception based medium access control and resource allocation |
US20110002319A1 (en) | 2008-03-04 | 2011-01-06 | Koninklijke Philips Electronics N.V. | Signaling of transmission settings in multi-user systems |
US20090275292A1 (en) | 2008-05-02 | 2009-11-05 | Soo-Young Chang | System and Method for Wireless Communications |
US8179867B2 (en) | 2008-05-09 | 2012-05-15 | Lg Electronics Inc. | Apparatus and method for transmission opportunity in mesh network |
US20110064013A1 (en) | 2008-06-23 | 2011-03-17 | Hang Liu | Collision mitigation for multicast transmission in wireless local area networks |
US20100002639A1 (en) | 2008-07-02 | 2010-01-07 | Samsung Electronics Co., Ltd. | System and method for reservation of disjoint time intervals in wireless local area networks |
US20100046453A1 (en) | 2008-08-19 | 2010-02-25 | Qualcomm Incorporated | Methods and apparatus for frame exchange for sdma uplink data |
US20100220601A1 (en) | 2009-02-27 | 2010-09-02 | Qualcomm Incorporated | Method and apparatus for scheduling transmissions in spatial division multiple access network systems |
US20100310003A1 (en) | 2009-06-05 | 2010-12-09 | Broadcom Corporation | Transmission acknowledgment within multiple user, multiple access, and/or mimo wireless communications |
US20120082200A1 (en) | 2009-06-12 | 2012-04-05 | Fundacio Privada Centre Tecnologic De Telecomunicacions De Catalunya | Method and apparatus for medium access control in a wireless broadband system with multiple-input multiple-output or multiple-input single-output technology with multiuser capabilities |
US20110090855A1 (en) | 2009-10-20 | 2011-04-21 | Electronics And Telecommunications Research Institute | Method for managing resources in high capacity wireless communication system |
US20110176627A1 (en) | 2010-01-15 | 2011-07-21 | Cheng-Hsuan Wu | Multi-user Transmission Method, Multiple Input Multiple Output Transmission System Using the Same, Scheduling Method and Access Point Using the Same |
US8532221B2 (en) | 2010-02-10 | 2013-09-10 | Marvell World Trade Ltd. | Transmission protection for wireless communications |
US20110255618A1 (en) | 2010-04-19 | 2011-10-20 | Samsung Electronics Co., Ltd. | Method and system for multi-user transmit opportunity for multi-user multiple-input-multiple-output wireless networks |
US20110317630A1 (en) | 2010-06-23 | 2011-12-29 | Chunhui Zhu | Method and system for contention avoidance in multi-user multiple-input-multiple-output wireless networks |
US20120008490A1 (en) | 2010-07-07 | 2012-01-12 | Samsung Electronics Co., Ltd. | Method and system for communication in multi-user multiple-input-multiple-output wireless networks |
US20120218947A1 (en) | 2010-08-31 | 2012-08-30 | Qualcomm Incorporated | Rules for multiplexing data of different access categories in multi user mimo wireless systems |
US20120087358A1 (en) | 2010-10-06 | 2012-04-12 | Chunhui Zhu | Method and system for enhanced contention avoidance in multi-user multiple-input-multiple-output wireless networks |
US20120140615A1 (en) | 2010-12-03 | 2012-06-07 | Gong Michelle X | Method, station and computer readable medium for downlink multi-user multiple access category medium access and error recovery |
US20120314694A1 (en) | 2011-06-07 | 2012-12-13 | Jing-Rong Hsieh | Method of Back-off Procedure Setup in a Wireless Communication System |
Non-Patent Citations (33)
Title |
---|
Camp, J.D. et al., "The IEEE 802.11s Extended Service Set Mesh Networking Standard", IEEE Communications Magazine, vol. 46, No. 8, IEEE, Aug. 2008, pp. 1-6, United States. |
Harada, Hiroshi, Unified and flexible millimeter wave WPAN systems supported by common mode. IEEE 802.15-07-0761-10-003c, Slides 1-62, Sep. 2007. |
IEEE 802.11, Standard for Information Technology-Telecommunications and Information Exchange between Systems-Local and Metropolitan Area Networks-Specific requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications-2007 (Revision of IEEE Std 802.11-1999), IEEE Computer Society, 1232 pages, (Jun. 12, 2007). |
IEEE 802.16e(TM) -2005, Standard for Local and Metropolitan Area Networks-Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems; Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands and Corrigendum 1;-Feb. 28, 2006, pp. 1-864. |
IEEE 802.16e™ -2005, Standard for Local and Metropolitan Area Networks—Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems; Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands and Corrigendum 1;—Feb. 28, 2006, pp. 1-864. |
IEEE Computer Society, "IEEE Std 802®-2001 (R2007), IEEE Standard for Local and Metropolitan Area Networks: Overview and Architecture", IEEE, Feb. 7, 2002, pp. i-36, New York, United States. |
IEEE P802.11e/D13.0, "Amendment: Medium Access Control (MAC) Quality of Service (QoS) Enhancements," Jan. 2005, pp. 1-198. |
IEEE Wireless LAN Edition (2003), A compilation based on IEEE Std. 802.11TM-1999 (R 2003) and its Amendments. |
International Search Report dated Jan. 9, 2009 for Application No. PCT/KR08/004793, filed Aug. 19, 2008. |
Kim et al., QoS enhancement scheme of EDCF in IEEE 802.11e wireless LANs, Electronics Letters 40(17): 1091-1092, Aug. 19, 2004. |
Mirkovic, J. et al., "A MAC Protocol With Multi-User MIMO Support for Ad-Hoc WLANs", The 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC'07), IEEE, 2007, pp. 1-5, United States. |
Morioka, Y. et al., "Multi-RTS Proposal", IEEE 802.11-10/1124r01, Sep. 12, 2010, Slides 1-14, IEEE, USA. |
Mujtaba et al., TGn Sync Proposal Technical Specification, IEEE 802.11-04-08 89r7, Jul. 2005. |
Stacey, R. et al., "DL MU-MIMO Ack Protocol (IEEE 802.11-09/1172r0)", IEEE, Nov. 16, 2009, pp. 1-8, United States. |
U.S. Advisiory Action mailed Mar. 8, 2013 for U.S. Appl. No. 12/415,981. |
U.S. Final Office Action for U.S. Appl. No. 12/821,940 mailed Aug. 21, 2012. |
U.S. Final Office Action mailed Dec. 19, 2012 for U.S. Appl. No. 12/415,981. |
U.S. Final Office Action mailed Jan. 14, 2014 for U.S. Appl. No. 12/415,981. |
U.S. Final Office Action mailed May 12, 2010 for U.S. Appl. No. 11/589,519. |
U.S. Non-Final Office Action for U.S. Appl. No. 13/177,386 mailed Dec. 17, 2013. |
U.S. Non-Final Office Action for U.S. Appl. No. 13/253,926 mailed Nov. 25, 2013. |
U.S. Non-Final Office Action mailed Aug. 8, 2013 for U.S. Appl. No. 12/415,981. |
U.S. Non-Final Office Action mailed Jun. 6, 2012 for U.S. Appl. No. 12/415,981. |
U.S. Non-Final Office Action mailed May 29, 2012 for U.S. Appl. No. 12/821,940. |
U.S. Notice of Allowance mailed Jan. 24, 2011 for U.S. Appl. No. 11/589,519. |
U.S. Office Action dated Aug. 21, 2007 in U.S. Appl. No. 11/044,600, filed Jan. 26, 2005. |
U.S. Office Action dated Aug. 7, 2008 in U.S. Appl. No. 11/044,600, filed Jan. 26, 2005. |
U.S. Office Action dated Jan. 15, 2008 in U.S. Appl. No. 11/044,600, filed Jan. 26, 2005. |
U.S. Office Action dated Jan. 25, 2007 in U.S. Appl. No. 11/044,600, filed Jan. 26, 2005. |
U.S. Office Action dated Jun. 27, 2006 in U.S. Appl. No. 11/044,600, filed Jan. 26, 2005. |
U.S. Office Action dated Jun. 9, 2009 in U.S. Appl. No. 11/589,519, filed Oct. 30, 2006. |
U.S. Restriction Requirement for U.S. Appl. No. 13/030,070 mailed Nov. 5, 2013. |
U.S. Restriction Requirement for U.S. Appl. No. 13/253,926 mailed Oct. 10, 2013. |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10462813B2 (en) * | 2010-01-15 | 2019-10-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for contention-based granting in a wireless communication network |
US10887918B2 (en) | 2017-09-25 | 2021-01-05 | Apple Inc. | Enhanced Wi-Fi access protocol (EWAP) |
Also Published As
Publication number | Publication date |
---|---|
US20090323611A1 (en) | 2009-12-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8670395B2 (en) | System and method for priority driven contention scheme for supporting enhanced QoS in a wireless communication network | |
US20200235889A1 (en) | Data transmission method and apparatus | |
US8917675B2 (en) | System and method for multiple contention access periods | |
US7609674B2 (en) | Data transmission method in wireless LAN, access point device and station device | |
US7873049B2 (en) | Multi-user MAC protocol for a local area network | |
US8165050B2 (en) | System and method for use of a short beacon in a wireless communication network | |
EP1700436B1 (en) | Terminal apparatus for enabling a plurality of different communication systems to coexist | |
CN110063036B (en) | Communication method, communication device station and access point | |
US8824495B2 (en) | System and method for reservation of disjoint time intervals in wireless local area networks | |
EP1892903B1 (en) | Wireless communication terminal and wireless communication method | |
US7593375B2 (en) | Medium access control apparatus for use in a channel overlay network | |
WO2015102228A1 (en) | Method and apparatus for transmitting uplink frame in wireless lan | |
EP2995152B1 (en) | Systems and methods for operation of wireless user devices with cellular and wi-fi interfaces | |
US20070165665A1 (en) | System and method for access control in wireless networks | |
US20230042554A1 (en) | Methods and apparatus for supporting prioritized transmission opportunity (txop) sharing | |
CN113766658B (en) | Self-organizing network for guaranteeing reliable transmission of high-priority time-sensitive service | |
US20040213191A1 (en) | Method for transmitting frames in WLAN | |
EP3735002B1 (en) | V2x communication device, and its message transmission and reception method for v2x communication device | |
WO2006025680A1 (en) | Data transmission method in wireless lan, access point device and station device | |
KR20120015615A (en) | Multiple access based on orthogonal frequency division multiplexing(ofdm) and communication equipment for contoring the same | |
KR100999039B1 (en) | Wireless Network System of Multi tier and Communication Method and Apparatus thereof | |
JP3979532B2 (en) | Wireless base station equipment | |
JP2017017430A (en) | Radio communication system, transmitter, receiver, radio communication method, and computer program | |
JP2006245908A (en) | Wireless lan system and communication apparatus | |
KR101281614B1 (en) | Apparatus and method for supporting access in wireless communication system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OF Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SINGH, HARKIRAT;NGO, CHIU;REEL/FRAME:022816/0524 Effective date: 20090529 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20220311 |